Person 1: So, it looks like I have to have a UA for this new job I got.
Person 2: What's the problem?
1: Well, a few weeks ago I smoked some pot. I don't know how long that stuff stays in your system. It would really suck to fail my UA.
2: Oh, that's easy. Just go in there and tell them that you just ate a whole bunch of sesame seeds and if anything funny comes up in your UA it's because of those seeds and nothing else.